Question: The compressive strength, in kilopascals, was measured for concrete blocks from five different batches of concrete, both three and six days after pouring. The data

The compressive strength, in kilopascals, was measured for concrete blocks from five different batches of concrete, both three and six days after pouring. The data are presented in the following table.

Can you conclude that the mean strength after six days is greater than the mean strength after three days?

Batch 2 4 After 3 days 34 1316 1352 355 1327 After 6 days 1376 1373 1366 1384 1358

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